If there are other theme that supports this let me know.
A lot of the free themes you can install from your WordPress dashboard support this. Heck, even Twenty Nineteen (one of the 3 themes installed by default when you installed your WordPress site) supports this.
But looking at the theme you chose, you’re not likely to fall in love with this Twenty Nineteen theme ?? — even though it supports this feature.
So your best bet is to first choose a theme you like, and test to see if it supports this feature. If it doesn’t, dump it and look for another theme you like, and test for this feature. Continue till you land your sweet spot of the theme you like that also supports this feature.
I am rather new to WordPress so I don’t know anything about coding and making child theme etc.
I checked out the free version of the theme you’re using, and, at least for the free version, all I had to do to enable this feature was to add one line of code to call the featured image.
Problem is, if you were to just drop this line of code into the theme’s file, an update would overwrite the change and you’d be back to square one. So you’d have to create a child theme to prevent this from happening, which complicates matters.
If you really want to go with this theme, you could post an add on the official job board and hire someone to make the change for you in a safe way so it won’t be erased by a theme update. https://jobs.wordpress.net/
Good luck!